deserialize dates only if both values are set

src/aura_engine_api/rest/controllers/public_controller.py

@@ -36,13 +36,14 @@ def list_tracks(from_date=None, to_date=None, page=None, limit=None):  # noqa: E
     fd = None
     td = None
 
-    try:
-        fd = util.deserialize_datetime(from_date)
-        td = util.deserialize_datetime(to_date)
-    except Exception:
-        service.logger.info(
-            "Invalid 'from_date' (%s) or 'to_date' (%s) for 'list_tracks'"
-            % (str(from_date), str(to_date))
-        )
+    if from_date is not None and to_date is not None:
+        try:
+            fd = util.deserialize_datetime(from_date)
+            td = util.deserialize_datetime(to_date)
+        except Exception:
+            service.logger.info(
+                "Invalid 'from_date' (%s) or 'to_date' (%s) for 'list_tracks'"
+                % (str(from_date), str(to_date))
+            )
 
     return service.list_tracks(page, limit, fd, td)